1. fearless calm or oblivious in the face of danger
  2. frivolous not serious in content, attitude, or behavior
  3. wireless medium for communication
  4. fairlead a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing
  5. variolous relating to small pox
  6. fairness conformity with rules or standards
  7. virilize produce virilism in or cause to assume masculine characteristics, as through a hormonal imbalance or hormone therapy
  8. virilise produce virilism in or cause to assume masculine characteristics, as through a hormonal imbalance or hormone therapy
  9. fair use the conditions under which you can use material that is copyrighted by someone else without paying royalties
  10. fairly without favoring one party, in a fair evenhanded manner
  11. hairless having no hair or fur
  12. fearlessly without fear
  13. frailness the state of being weak in health or body
  14. airless lacking fresh air
  15. fruitless unproductive of success
  16. faithless having the character of a traitor; disloyal
  17. fairy light a small colored light used for decoration
  18. fireplace an open recess in a wall at the base of a chimney where a fire can be built
  19. fairy swallow fancy domestic pigeon having blue-and-white plumage and heavily muffed feet
  20. fatherless having no living male parent